Health and Welfare Training Center of Korean National Institute of Health (KNIH) has developed various education curricula for officials who are involved in the public health or welfare sectors. Still almost all education programmes are off-line based. In off-line settings, both the lecturers and the students should come to NIH from their counties to join the education programmes, and it is impossible for the students to review or to re-practice the education contents. We developed a prototype on-line setting education programmes to provide a more convenient and more effective service to the officials. This web-based interactive education programme consisted of the specific objectives on vaccination for the public health officials who were working for the national immunization programmes. It became a prototype of web-based education and was evaluated by the participants in April, 2001. From the evaluation, we improved the contents and tried to develop more subjects for the officials' training.